Unverified Commit 67e98231 authored by openeuler-ci-bot's avatar openeuler-ci-bot Committed by Gitee
Browse files

!10694 v2 drm/shmem-helper: Fix BUG_ON() on mmap(PROT_WRITE, MAP_PRIVATE) 

Merge Pull Request from: @ci-robot 
 
PR sync from: Pu Lehui <pulehui@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/W7BZW627ZIR27NHQ3J5LT5R2HNM7HBW6/ 
 
https://gitee.com/src-openeuler/kernel/issues/IACS4Z 
 
Link:https://gitee.com/openeuler/kernel/pulls/10694

 

Reviewed-by: default avatarXu Kuohai <xukuohai@huawei.com>
Signed-off-by: default avatarYang Yingliang <yangyingliang@huawei.com>
parents da8d4e40 afe656d5

drivers/gpu/drm/drm_gem_shmem_helper.c

+5 −0
Original line number Diff line number Diff line
@@ -17,6 +17,8 @@ 
#include <drm/drm_prime.h>

#include <drm/drm_print.h>



#include "../../../mm/internal.h"	/* is_cow_mapping() */



/**

 * DOC: overview

 *
@@ -630,6 +632,9 @@ int drm_gem_shmem_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma) 
		return ret;

	}



	if (is_cow_mapping(vma->vm_flags))

		return -EINVAL;



	shmem = to_drm_gem_shmem_obj(obj);



	ret = drm_gem_shmem_get_pages(shmem);